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queuearray: add _peek_tail() and _pop_tail()

Browse source 
API: gst_queue_array_pop_tail()
API: gst_queue_array_peek_tail()

These will be needed later for appsrc.
This commit is contained in:
Tim-Philipp Müller 2018-02-01 18:29:27 +00:00
parent 9fb56a32f5
commit bbf8f50cde
5 changed files with 128 additions and 0 deletions
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2
docs/libs/gstreamer-libs-sections.txt
View file

@ -928,6 +928,8 @@ gst_queue_array_get_length
gst_queue_array_pop_head
gst_queue_array_peek_head
gst_queue_array_push_tail
gst_queue_array_pop_tail
gst_queue_array_peek_tail
gst_queue_array_is_empty
gst_queue_array_drop_element
gst_queue_array_find

65
libs/gst/base/gstqueuearray.c
View file

@ -160,6 +160,7 @@ gst_queue_array_pop_head (GstQueueArray * array)
{
gpointer ret;
g_return_val_if_fail (array != NULL, NULL);
/* empty array */
if (G_UNLIKELY (array->length == 0))
return NULL;
@ -298,6 +299,7 @@ void
gst_queue_array_push_tail (GstQueueArray * array, gpointer data)
{
g_return_if_fail (array != NULL);
/* Check if we need to make room */
if (G_UNLIKELY (array->length == array->size))
gst_queue_array_do_expand (array);
@ -308,6 +310,69 @@ gst_queue_array_push_tail (GstQueueArray * array, gpointer data)
array->length++;
}
/**
* gst_queue_array_peek_tail: (skip)
* @array: a #GstQueueArray object
*
* Returns the tail of the queue @array, but does not remove it from the queue.
*
* Returns: The tail of the queue
*
* Since: 1.14
*/
gpointer
gst_queue_array_peek_tail (GstQueueArray * array)
{
guint len, idx;
g_return_val_if_fail (array != NULL, NULL);
len = array->length;
/* empty array */
if (len == 0)
return NULL;
idx = (array->head + (len - 1)) % array->size;
return *(gpointer *) (array->array + (sizeof (gpointer) * idx));
}
/**
* gst_queue_array_pop_tail: (skip)
* @array: a #GstQueueArray object
*
* Returns the tail of the queue @array and removes
* it from the queue.
*
* Returns: The tail of the queue
*
* Since: 1.14
*/
gpointer
gst_queue_array_pop_tail (GstQueueArray * array)
{
gpointer ret;
guint len, idx;
g_return_val_if_fail (array != NULL, NULL);
len = array->length;
/* empty array */
if (len == 0)
return NULL;
idx = (array->head + (len - 1)) % array->size;
ret = *(gpointer *) (array->array + (sizeof (gpointer) * idx));
array->tail = idx;
array->length--;
return ret;
}
/**
* gst_queue_array_is_empty: (skip)
* @array: a #GstQueueArray object

6
libs/gst/base/gstqueuearray.h
View file

@ -43,6 +43,12 @@ gpointer gst_queue_array_pop_head (GstQueueArray * array);
GST_EXPORT
gpointer gst_queue_array_peek_head (GstQueueArray * array);
GST_EXPORT
gpointer gst_queue_array_pop_tail (GstQueueArray * array);
GST_EXPORT
gpointer gst_queue_array_peek_tail (GstQueueArray * array);
GST_EXPORT
void gst_queue_array_push_tail (GstQueueArray * array,
gpointer data);

53
tests/check/libs/queuearray.c
View file

@ -262,6 +262,58 @@ GST_START_TEST (test_array_grow_from_prealloc1)
GST_END_TEST;
GST_START_TEST (test_array_peek_pop_tail)
{
const guint array_sizes[] = { 0, 1, 2, 5 };
guint s;
for (s = 0; s < G_N_ELEMENTS (array_sizes); ++s) {
GstQueueArray *array;
GST_INFO ("Testing with initial size %u", array_sizes[s]);
array = gst_queue_array_new (array_sizes[s]);
fail_unless_equals_int (gst_queue_array_get_length (array), 0);
fail_unless (gst_queue_array_peek_tail (array) == NULL);
fail_unless (gst_queue_array_pop_tail (array) == NULL);
gst_queue_array_push_tail (array, GINT_TO_POINTER (42));
fail_unless_equals_int (gst_queue_array_get_length (array), 1);
fail_unless (gst_queue_array_peek_tail (array) == GINT_TO_POINTER (42));
fail_unless (gst_queue_array_peek_head (array) == GINT_TO_POINTER (42));
fail_unless_equals_int (gst_queue_array_get_length (array), 1);
fail_unless (gst_queue_array_pop_tail (array) == GINT_TO_POINTER (42));
fail_unless_equals_int (gst_queue_array_get_length (array), 0);
gst_queue_array_push_tail (array, GINT_TO_POINTER (42));
fail_unless_equals_int (gst_queue_array_get_length (array), 1);
fail_unless (gst_queue_array_pop_head (array) == GINT_TO_POINTER (42));
fail_unless_equals_int (gst_queue_array_get_length (array), 0);
fail_unless (gst_queue_array_peek_tail (array) == NULL);
fail_unless (gst_queue_array_pop_tail (array) == NULL);
gst_queue_array_push_tail (array, GINT_TO_POINTER (43));
gst_queue_array_push_tail (array, GINT_TO_POINTER (44));
fail_unless_equals_int (gst_queue_array_get_length (array), 2);
fail_unless_equals_int (GPOINTER_TO_INT (gst_queue_array_peek_head (array)),
43);
fail_unless_equals_int (GPOINTER_TO_INT (gst_queue_array_peek_tail (array)),
44);
fail_unless_equals_int (gst_queue_array_get_length (array), 2);
fail_unless (gst_queue_array_pop_tail (array) == GINT_TO_POINTER (44));
fail_unless_equals_int (gst_queue_array_get_length (array), 1);
fail_unless (gst_queue_array_peek_head (array) == GINT_TO_POINTER (43));
fail_unless (gst_queue_array_peek_tail (array) == GINT_TO_POINTER (43));
fail_unless_equals_int (gst_queue_array_get_length (array), 1);
gst_queue_array_free (array);
}
}
GST_END_TEST;
static Suite *
gst_queue_array_suite (void)
{
@ -277,6 +329,7 @@ gst_queue_array_suite (void)
tcase_add_test (tc_chain, test_array_grow_end);
tcase_add_test (tc_chain, test_array_drop2);
tcase_add_test (tc_chain, test_array_grow_from_prealloc1);
tcase_add_test (tc_chain, test_array_peek_pop_tail);
return s;
}

2
win32/common/libgstbase.def
View file

@ -316,8 +316,10 @@ EXPORTS
gst_queue_array_new_for_struct
gst_queue_array_peek_head
gst_queue_array_peek_head_struct
gst_queue_array_peek_tail
gst_queue_array_pop_head
gst_queue_array_pop_head_struct
gst_queue_array_pop_tail
gst_queue_array_push_tail
gst_queue_array_push_tail_struct
gst_type_find_helper